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Licensed Unlicensed Requires Authentication Published by De Gruyter April 28, 2021

Effects of rhizome and root trimming on the growth and survival of Phyllospadix iwatensis transplants: a case study in Shandong Peninsula, China

Xin Hou, Ran Cheng, Jia Song, Chongfeng Zhong, Pei-dong Zhang, Bin Kang and Wen-Tao Li ORCID logo
From the journal Botanica Marina


Surfgrass Phyllospadix iwatensis has been declining in the past decades. Transplantation is considered to be the best option to restore the degraded surfgrass beds due to its low seed production. To develop a surfgrass transplanting strategy to increase transplant survival rate and also to minimize damage to donor beds when harvesting transplants, an experiment was conducted to assess the effects of rhizome and root trimming on transplant survival and growth. P. iwatensis shoots with different rhizome and root trimming treatments were planted in a subtidal area in Mashanli at the east end of Shandong Peninsula, China in September 2018, and after the transplantation, a bi-monthly sampling had been conducted for one year. The results showed that, at the early stage of transplantation, the transplant survival rates of all four treatment groups decreased to the lowest at four months after transplantation, and then gradually increased until reaching at least 103.2% in all the treatment groups at the end of the experiment, and the transplants with roots on both short and long rhizomes had a significantly higher survival rate than those without roots. The results also showed that, although the morphological measurements, as well as the above- and below-ground productivity varied greatly with time and among different treatments during the study period, most of them showed no significant differences between treatments at the end of the experiment. These results suggest that surfgrass shoots with roots and a short rhizome are the most strongly recommended transplant candidates, and those with a short rhizome without roots are also good candidates, which might help make full use of harvested plants, optimize transplant harvesting strategies, and hence minimize damage to donor meadows.

Corresponding author: Wen-Tao Li, The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao266003, China, E-mail:

Funding source: Fundamental Research Funds for the Central Universities of China

Award Identifier / Grant number: 201964002

Award Identifier / Grant number: 201822021

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This research was supported by the Fundamental Research Funds for the Central Universities of China (201964002, 201822021).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.


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Received: 2020-11-09
Accepted: 2021-04-08
Published Online: 2021-04-28
Published in Print: 2021-06-25

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